Experimental Study For Heat Transfer Enhancement of a Radiator using Twisted Inserts with Different Coolants
Keywords:
Car radiator, twisted inserts, heat transfer coefficient, Nusselt Number, turbulence, Reynolds Number and Prandtal Number, cooling performance.Abstract
The radiator is used for cooling the internal combustion engine cylinder with the help of different coolant fluids. It is an essential part for any IC engine for its proper and smooth operation. In radiator the coolant fluid absorb the heat from engine cylinder and finally rejects to surrounding air. It has been observed by various researchers that the enhancement of thermal performance of a radiator is a major problem. In this dissertation study of a car radiator is investigated to improve its thermal performance by increasing heat transfer rate. In present work the experimental work of three cases have been investigated for various mass flow rate for general heat exchange fluid of water and coolant with mixture (50% of ethylene glycol + 50%water).We have considered firstly by simple circular tube radiator and secondly the twisted wire inserted radiator and thirdly twisted tape inserted radiator for its experimental observation and performance by using two fluids as water and mixture (50% of ethylene glycol +50% of water).In this project work the Nusselt number and heat transfer coefficient and heat transfer have been calculated experimentally and then co- related with the available co-relation Dittuss-boelter’s and Gnielinski. The first experiments have been done by using Coolant (water).It has seen that the 33.33% enhancement of Nusselt number and 40% enhancement of heat transfer by using twisted inserts in simple tube of radiator as compared to simple tube of in radiator at different mass flow rates. The second experiments have been done by using a coolant (with mixture of ethylene glycol + water (50:50) combination. So it is a biggest achievement of heat transfer rate in car radiator and better cooling effect and finally reduces spaces in car radiator tubes.
References
2. L. Syam sundar and, K.V. Sharma, “Turbulent heat transfer and friction factor of Al2O3 Nano fluid in circular tube with twisted tape inserts”, International Journal of Heat and Mass Transfer 53 ,1409–1416.
3. Ravikanth S. Vajjha, and Debendra K. Das, “Numerical study of fluid dynamic and heat transfer performance of Al2O3 and CuO Nano fluids in the flat tubes of a radiator,” Volume 31, Issue 4, August 2010, Pages 613–621.
4. S.M. Peyghambarzadeh and S.H. Hashemabadi, “Improving the cooling performance of automobile radiator with Al2O3/water Nano fluid,” Volume 31, Issue 10, Pages 1833–1838.
5. S.M. Peyghambarzadeh and S.H.Hashemabadi, “Experimental study of heat transfer enhancement using water/ethylene glycol based Nano fluids as a new coolant for car radiators,” Volume 38, Issue 9, Pages 1283–1290.
6. Mansour and Alireza Saeedi, “Numerical investigation into the convective heat transfer of CuO Nano fluids flowing through a straight tube with uniform heat flux”, Vol. 5 No. S3 ISSN: 0974- 68468.
7. Navid Bozorgan, Komalangan Krishnakumar and Nariman Bozorgan, “numerical study on application of cuo – water Nano fluid in automotive diesel engine radiator”, 2, 130-136.
8. V. L. Bhimani , Dr. P. P. Rathod and Prof. A. S. Sorathiya, “Experimental Study of heat transfer enhancement using water based Nano fluids as a new coolant for car radiators”, ISSN 2250-2459, ISO 9001:2008 Certified Journal, Volume 3, Issue 6, June.
9. M.Naraki and S.M. Peyghambarzadeh, “Parametric study of overall heat transfer coefficient of CuO/water Nano fluids in a car radiator”, International journal of thermal sciences 66, 82-90.
10. S.M.Peyghambarzadeh,S.H.Hashemabadi, “Experimental study of overall heat.
